Question

How do you do this? Huge struggle

Answer 1

A=πr^2 is the equation of the area of a circle.
You’re going to plug in the given pieces of the equation, so for π put 3.14 and for r put 13.
Your equation should look like A=(3.14)(13)^2. Put that into the calculator and you should get 530.

Answer 2

You plug 13 into where the r is and then solve, using a calculator